Packaging machine



March 9, 1943. s HOWARD 2,313,643

PACKAGING MACHINE Filed July 15, 1940 5 Sheets-Sheet l INVENT OR.

O 10a 30 iza \g m March 9, 1943. R, HOWARD 2,313,643

PACKAGING MACHINE Filed July 13, 1940 5 Sheets-Sheet 2 March 9, 1943. s HOWARD 2,313,643

PACKAGING MACHINE Filed July 13, 1940 5 Sheets-Sheet3 INVENT OR.

March 9, 1943. s HOWARD 2,313,643

PACKAGING MACHINE Filed July 13, 1940 5 Sheets-Sheet 4 March 9, 1943.

S. R. HOWARD INVENTOR.

Patented Mar. 9, 1943 PACKAGING MACHINE Stanley R. Howard, Milton, Mass, assignor to Pneumatic Scale Corporation, Limited, Quincy, Mass., a corporation of Massachusetts Application July 13, 1940, Serial No. 345,323

17 (Jlaims.

This invention relates to a packaging machine and particularly to an adhesive applying device for a packaging machine.

The invention has for an object to provide a novel and improved packaging machine having an adhesive applying device of novel and improved construction by which the thickness of the film of adhesive applied to the sealing flaps of a carton may be controlled in a positive manner so as to provide a uniform coating of adhesive of predetermined thickness in order to obtain the most eflicient results in the sealing operation. Provision is also made in the improved packaging machine for controlling the supply of adhesive in a simple, practical and efficient manner.

With this general object in view and such others as may hereinafter appear, the invention consists in the packaging machine and in the various structures, arrangements and combinations of parts hereinafter described and particularly defined in the claims at the end of this specification.

In the drawings which illustrate the preferred embodiment of the invention, Fig. 1 is a side elevation of a sufficient portion of a packaging machine, embodying the adhesive applying device. to enable the present invention to be understood; Fig. 2 is a front elevation of a portion of the mechanism shown in Fig. 1 showing a safety mechanism to be referred to; Figs. 3 and 4 are detail views illustrating the adhesive applying roller in different positions of operation; Figs. 5, 6 and '7 are perspective views of a carton showing the manner of folding down the flaps preparatory to applying adhesive; Fig. 8 is an enlarged detail view in cross-section of the adhesive applying roller to be referred to; Fig. 9 is a side elevation of the driving mechanism for the adhesive sup- 1 ply rollers and the adhesive circulating device; Fig. 10 is a plan view detail of the flap supporting plate and guide for the adhesive applying roller, to be referred to; Fig. 11 is a side elevation in cross-section of the adhesive supply rollers, the section being taken on the line ll l of Fig. 12; and Fig. 12 is a front elevation of the adhesive supply rollers.

In general, the present invention contemplates an improved adhesive applying device particularly adapted for use in the application of adhesive to the carton flaps in amachine for forming, filling, closing and sealing cartons. In the preferred embodiment of the invention, the carton is received in a pocket mounted upon an intermittently rotated spider adapted to present the carton to the various instrumentalities for closing three of the usual four bottom closing flaps, filling the carton, and thereafter closing three of the top flaps leaving the remaining top and bottom flaps free for the application of adhesive, whereupon the adhesively coated flaps are folded over on top of the previously closed flaps to adhesively seal each end of the carton. Such operations may be performed upon any of the usual packaging machines now upon the market, the present invention being directed particularly to the adhesive applying mechanism.

In the illustrated embodiment of the invention, the adhesive applying roller is arranged to operatively engage a supply roller coated with adhesive and to be bodily moved over the sealing flap to transfer the adhesive thereon. In prior machines the adhesive transferring or applying roller has been moved into direct contact with its supply roller sometimes causing an excessive amount of adhesive to be received by the applying roller and to be transferred to the carton flap which seriously interfered with an efficient sealing operation. In accordance with one feature of the present invention, the transferring or applying roller is arranged to be positioned a predetermined distance from the supply roller during the transfer of the adhesive from the supply roller to the applying roller, such distance corresponding to the thickness of the film of adhesive to be applied, thus enabling the transfer roller to receive the desired amount of adhesive to be applied to the sealing flaps of the carton. In practice, and in the preferred embodiment of the invention, the applying roller is provided with gaging wheels or rollers slightly larger in diameter I than the applying rollers which are arranged to bear against surfaces of the supply roller which are free of adhesive during the transferring operation thus preventing the applying roller from coming into direct pressing engagement with the supply roller. Provision is also made in the preferred embodiment of the invention for adjustably controlling the thickness of the film of adhesive upon the supply roller in order to obtain the best results during the transferring operation. In the preferred embodiment of the invention, provision is also made for controlling the supply of the fluid adhesive to the rollers and for returning the surplus adhesive to the supply tank. In practice, scraper members are provided in order to confine the adhesive to the portions of the supply roller from which it is transferred and in order to prevent the adhesive from getting onto those portions of the supply roller against which the gaging wheels are arranged to bear.

Referring now to the drawings, as shown in Fig. 1, the carton I to be sealed is supported in a pocket I2 which may be carried by a circular disk I4 provided with a plurality of pockets and which is arranged to be intermittently rotated to present the carton to successive stations of the packaging machine. Prior to arriving at the adhesive applying station, the carton, as shown in Fig. 5, has been filled with material and has had three of its four upper and lower closing flaps folded down to present the carton to the glue applying device in the condition shown in Fig. 6. The flaps thus folded down are held in their closed position during the adhesive applying operation by upper and lower rails 2|, 23, as shown in Fig. 1. In the illustrated carton, it will be observed that the end flaps I6, I8 are cut at an angle to expose the central part of the surface of the underlying side flap 20 so that when adhesive is applied to the remaining side flap 22, as shown in Fig. 7, and folded over onto the previously closed flaps, the flap 22 will engage and be adhesively secured to the three underlying fiaps. Although Figs. 5, 6 and 7 show only the top flaps of the carton, it will be understood that the bottom flaps are similarly folded and supplied with adhesive.

In the preferred embodiment of the invention,

provision is made for folding the vertically extended top and bottom flaps 22, 24 outwardly from the carton against upper and lower supporting plates 26, 28 respectively, as illustrated in Fig. 1, and to hold them down in a horizontal position until they are engaged by the upper and lower adhesive applying rollers 30, 32, respectively. This operation is preferably performed by folding fingers 34, 36 carried on the end of rocker arms 38, 40 respectively, Each folding finger 34, 36 is pivotally and yieldingly mounted, the fingers being normally retained in the position shown in Fig. 1 by springs 42, 44, which urge the extended portions 46, 48 of the fingers against stop lugs 50, 52.

The rocker arms 38, 40 are arranged to be actuated in timed relation to the operation of the various instrumentalities of the packaging machine, and to the operation of the adhesive applying rollers, 30, 32, and as herein shown, the arms are arranged to be simultaneously operated through connections from a cam 54 fast upon a cam shaft 56 forming part of the packaging machine. The upper arm 38 forms one arm of a two-armed lever pivoted on a stud 58 secured in a bracket 60 attached to the platen 62 of the machine frame. The other arm 64 of the twoarmed lever is connected by a link 66 to one arm 68 of a two-armed lever rocklngly mounted on a stud 10 secured to the bracket 60. The second arm 12 is connected by a link 14 to one arm I6 of a cam lever pivotally mounted on a rocker shaft 18 mounted in the machine frame. The other arm 80 of the cam lever carries a cam roller 82 arranged to cooperate with the cam 54. A spring 84 is provided to hold the roller 82 against its cam.

The lower rocker arm 40 is pivotally mounted on a stud 86 and is provided with a second arm 88 connected by a link 90 to the arm I2 at a point 92 intermediate the ends of the latter. Thus, through the connections above described, the rocker arms 38, 40 are simultaneously actuated in timed relation to the carton sealing machine. As illustrated in Fig. 2. the cam shaft 56 may be driven in any usual or preferred manner such as by an electric motor, not shown, through connections including a driving pinion 84 and a gear 86, the latter being fast upon the cam shaft 56.

From the description thus far it will be observed that the folding finger 34, 36 operate to fold down the vertically extended top and bottom flaps 22, 24 in an outwardly and horizontally extended position against the supporting plates 26, 28 in preparation for receiving a coating of adhesive from the applying rollers 30, 32. Provision is made for moving the applying rollers 30, 32, from a position in operative engagement with supply rollers 88, I00, as shown in Fig. 1, where they receive a coating of adhesive and across the flaps 22, 24, see Fig. 4, to apply the adhesive thereto, whereupon they are returned to the position shown in Fig. 1. As herein shown, the adhesive transferring or applying rollers 30, 32, are rotatably mounted upon pins I02, I04 carried in arms I06, I08. The arms I06, I08 are pivotally mounted upon pin H0, H2 carried by rocker arms H4, H6, the latter being rocklngly mounted upon the studs 58, 86. The arms H4, H6 are arranged to be simultaneously rocked through connections from a cam II8 secured to the outer end of the cam shaft 56. As illustrated in Fig. 1, the upper rocker arm II4 forms one arm of a bell-crank, the second arm I20 being connected by a link I22 to one arm I24 of a two-armed lever pivotally mounted on the stud I0. The other arm I26 of the two-armed lever is connected by a link I28 to one arm I30 of a cam lever rocklngly mounted on the rocker shaft I8. The other arm I32 carries a roller I34 which cooperates with the cam II8. A spring I36 is connected to the arm I32 to hold the roller against its cam. As herein shown, the lower rocker arm I I6 forms part of a bell-crank, the second arm I38 being connected by a link I40 to the arm I26.

Each adhesive transferring roller 30, 32 is arranged to be yieldingly held in operative engagement with its supply roller and against the supporting plates 26, 28 as they are moved thereover to apply adhesive to the flaps 22. 24. As shown in Fig. 1, the upper roller arm I06 is urged in a counterclockwise direction by a spring I42 connected to the arm I20 and to the lever I44 forming a second arm of the roller arm I 06. The lower roller arm I08 is similarly urged in a clockwise direction, viewing Fig. 1, by a spring I46 which is connected to an arm I48 formed integrally with the roller arm I08 and to an extension I50 from the rocker arm II6. Thus, under normal operating conditions, the adhesive applying rollers 30, 32 are simultaneously actuated in timed relation to the operation of the flap folding fingers 34, 36 so that when an applying roller has been advanced to the position shown in Fig. 3 to engage the edge of a-flap, the finger is retracted to the position shown in Fig. 4.

- In the event that there is no carton present in the pocket I2 when the latter arrives at the adhesive applying station, provision is made for preventing the movement of the adhesive applying rollers 30, 32. For this purpose a safety device including a feeler finger I52 is provided which is arranged to be swung into a path of a carton in the pocket and which operates to move a latch I54, see Fig. 2, into the path of a latch member I56, extended from and formed integrally with the cam lever arm I30, when there is no carton present, as shown in the dotted line position of the latch I54. Normally, when the feeler finger engages a carton in the pocket, the latch I54 will be moved up into the full line position shown in Fig. 2. As herein shown, the feeler finger I52 is secured to a vertical rod I58 supported between trunnions I68, I82. The upper trunnion I68 is adjustably mounted in a bracket I64 which is secured to a standard I68 mounted on the platen 62. The lower trunnion I82 is fixed in an anglepiece ,I88 secured to the machine frame. The lower end of the vertical rod I58 is provided with a lever I18 fast thereon which is connected by'a link I12 to a lever I14, pivoted at I18 and formed integrally with the latch I54.

A spring I18 connected to the lever I14 tends to urge the parts in a direction to swing the feeler finger I52 into the path of the carton. Thus in operation, when the pocket is empty, the latch I54 will engage the member I56 and prevent the cam roller I34 from following its cam II8, thus rendering the adhesive applying rollers 38, 32 inoperative.

From the description thus far it will be observed that when the pocket I2 carrying the filled carton is brought into position in front of the adhesive applying device in the condition shown in Fig. 6, the extended flaps are horizontally extended and supplied with a coating of adhesive. As herein shown, the supply rollers 98, I88 are rotatably supported upon shafts I88, I82 secured in the bracket 68. The rollers are geared together by intermeshing gears I84, I86 secured to the supply rollers 98, I88 respectively, and are arranged to be continuously rotated through connections from a gear reduction motor I88, see

Fig. 9, including a sprocket I98 on the motor shaft, chain I92 and sprocket I94, the latter being fast on a stud I96 rotatably mounted in the bracket 68. The stud I96 is also provided with a pinion I98 fast thereon which meshes with the upper supply roll gear I84, as illustrated in Figs. 2 and 12.

Provision is made for supplying a continuous stream of adhesive into the bite of the rollers 98, I 88, and as herein shown, the adhesive is circulated by a pump 288 from a supply tank 282 through the pipes 284, 286 and onto the supply rollers, as illustrated in Fig. l. The supply rollers operate to spread the adhesive out over the surface of the rolls to provide a uniform thickness of glue to be transferred to the applying rollers 38, 32. The surplus glue is arranged to be received by a funnel 288 to be returned to the supply tank 282 through the pipe '2I8. 'The pump is arranged to be continuously driven through connections from the motor I88 including a sprocket 2I2, chain 2I4 and sprocket 2I6, the latter being connected to the pump shaft 2I8.

Referring now to Figs. 1 and 12, provision is made for adjusting the lower supply roll I88 with relation to the upper roll 98 in order to obtain which will cause the roller I88 to be moved away from the roller 98 and to provide a relatively thick film of glue upon the rollers 98, I88. When the stop screw 228 is turned in the opposite di-. rection, the-lower roller I88 will be brought closer to its cooperating roller 98 to provide a relatively thin spread of the glue upon the rollers. As herein shown, the outer ends of the stationary supporting shafts I 88, I82 are braced together by a tie rod 228 which adjustably connects the collars 238, 232 clamped upon the shafts I88. I82 respectively.

In accordance with the present invention, provision is made for positively controlling the film of adhesive transferred from the supply rolls 88. I88 to the applying rollers 38, 32 and as here- 'in shown, each applying roller is' provided with a pair of gaging wheels or 'bearer rolls 234, 236, one disposed at each end of the roll. The bearer rolls 23,4, 236 are formed integrally with and are spaced from the adhesive applying portion of the roller by grooved portions 238, 248. In operation, the bearer rolls are arranged to engage bearing surfaces 242, 244 provided on the supply rolls 98, I 88 which are also formed integrally with and are spaced from the adhesive supply portion of the rolls by grooved portions 246, 248. In the preferred embodiment of the invention, the gaging'wheels 234, 236 are made slightly larger than the adhesive applying portion of the rollers 38, 32. The bearing surfaces 242, 244 are preferably of the same diameter as the adhesive supplying portion of the rollers 98, I 88. As a result of this construction, when the adhesive applying rolls 38, 32 are brought into operative engagement with their respective supply rollers 98, I 88, there is a slight gap between the supply rolls and the applying rollers, as indicated at 258, in Fig. 8, which corresponds substantially to the thickness of the film of ad hesive to be transferred. It will be observed that the applying rollers 38, 32 are positively driven at the same surface speed as the supply rollers by the provision of pinions 252 formed integrally with the applying rollers and which are arranged to mesh with gears I84, I86 when the applying rollers are brought into cooperative engagement with their respective supply rollers. In the operation of the device, the lower supply roller a uniform film of glue of the desired thickness on the supply rollers. As herein shown, the lower roller I88is rotatably mounted upon an eccentric bushing 228 carried by the stationary shaft I82. A lever 222 is securely clamped to the extended end of the eccentric bushing. A spring 224 is arranged to urge the lever in a counterclockwise I88 is adjusted with respect to the upper roller 98 by means of the eccentric bushing 228, as

above described, to control the thickness of the film of adhesive on the supply rollers. In'practice, it has been found that best result are obtained by adjusting the supply rolls 98, I88 to provide a film of adhesive slightly greater than the gap 258.

Referring now to Figs. 1 and 10, it will be observed that each supporting plate 26, 28 against which the flaps 22, 24 rest during the adhesive applying operation is provided with bearing surfaces or runners 254, 256 along which the bearer rolls 234, 236 are arranged to run. The runners 254, 256 are separated from the flap supporting portion 258 of the plate by grooved portions 268, 262. It will be observed that the flap supporting portion of the plate extends only far enough to support they length of the flaps 2 2, 24, the remainder of the plate, between the runners 254, 256 being cut out to provide a space 264 therebetweten. As a result of this construction, the adhesive is confined to the flaps and is prevented from accumulating on the plate or on the runners. In practice, the flap supporting surface and the tops of the runners are flush so that the thickness of the flap makes up for the difference in diameter between the gaging wheels 234, 238 and the adhesive applying portions of the rollers 30, 32, in order to obtain an eflicient transfer of the adhesive from the roller to the fiap. In practice, the thickness of the flap is such that the adhesive applying rollers bear directly against the flaps with substantial pressure. It will be understood that the diiTerence in diameter between the adhesive applying surface and the gaging wheels is relatively small, depending on the thickness of the film of adhesive required, and in practice, good results have been obtained by having the gaging wheels six-thousandths of an inch larger in diameter, making the gap 250 three-thousandths of an inch, the thickness of the fiap being approximately nine-thousandths of an inch. As illustrated in Fig. 1, the supporting plates 28, 28 are supported from the bracket 60 by a vertical member 265 which adjustably supports connecting members 268, 268 formed integrally with the supporting plates.

Referring now to Figs. 11 and 12, provision is made for scraping the adhesive from the edges of the adhesive supplying surfaces of the rollers 98, Ill! and, as herein shown, scraper members 210, 212 are provided, having scraping surfaces 214, 216 which fit into the grooves 246, 248 and which operate to scrape the surplus adhesive from the edges of the'adhesive supplying portions of the roll and return it to the supply tank thus maintaining the bearing surfaces 242, 2 of the rolls free from adhesive. The scraper member 210 is supported irom the stationary shaft I80, being clamped thereon and thescraping surfaces are maintained in scraping engagement with the rollers by a set screw 218 which provides lateral pressure against the scraper member. The set screw 218 is supported in an extension 280 from the collar 232 as shown in Fig. 12. The scraper member 212 is supported upon studs 28!, 282 which are slidably mounted in the bracket 60 and which are arranged to be adjusted inwardly to provide the desired lateral pressure. A guide plate 28 extending between the scraper members is attached to the member 210 and is disposed between the rolls in a position to receive the surplus adhesive and to guide it into the funnel 208 to be returned to the supply tank. An enlarged portion 288 of the scraper member 212 is arranged to cover the pinion I98 to prevent adhesive from being deposited on the gears, as shown in Figs. 1 and 11.

From the above description it will be observed that the present construction of the adhesive applying device enables the film of adhesive deposited upon the applying roller to be positively controlled, thus insuring an even and uniform application of the adhesive upon the sealing flaps of the carton and enabling more perfectly sealed cartons to be produced.

While the preferred embodiment of the invention has been herein illustrated and described, it will be understood that the invention may be embodied in other forms within the scope of the following claims.

Having thus described the invention, what is claimed is:

1. In a packaging machine, in combination, an adhesive supply roll, a cooperating adhesive applying roll, means for supplying adhesive to the supply roll, means for maintaining the adhesive carrying portions of said rolls spaced 2. predetermined distance apart during the transfer of adhesive from said supply roll to said applying roll,

carton supporting means, and means for relatively moving the carton supporting means and the adhesive applying roll to effect the application of adhesive to a portion of the carton.

2. In a packaging machine, in combination, an adhesive supply roll, a cooperating adhesive applying roll, means for supplying adhesive to the supply roll, means for maintaining the adhesive carrying portions of said rolls spaced a predetermined distance apart during the transfer of adhesive from said supply roll to said applying roll, carton supporting means, and means for relatively moving the carton supporting means and the adhesive applying roll to effect the application of adhesive to a fiap of the carton.

3. In a packaging machine, in combination, an adhesive supply roll having an adhesive carrying portion, and an adhesive-free portion, an adhesive applying roll having an adhesive carrying portion and an adhesive-free portion, means including said adhesive-free portions for maintaining the adhesive carrying portions of said rollsin predetermined spaced relation during the transfer of adhesive from said supply roll to said applying roll, whereby to insure a predetermined thickness of film of adhesive upon the adhesive applying roll, carton supporting means, and means for moving the adhesive applying 'roll to apply adhesive to a carton sup ported by said carton supporting means.

4. In a packaging machine, in combination, an adhesive supply roll having an adhesive carrying portion, and an adhesive-free portion, an adhesive applying roll also having an adhesive carrying portion and an adhesive-free portion, a second adhesive supply roll cooperating with the first adhesive supply roll to control the thickness of the film of adhesive thereon, means including said adhesive-free portions for maintaining the adhesive carrying portions of .said supply and applying rolls in predetermined spaced relation during the transfer of adhesive from said supply roll to said applying roll, and means for moving the adhesive applying roll to perform the adhesive applying operation.

5. In a packaging machine, in combination, two cooperating adhesive supply rolls, means for adjusting the distance between said rolls to control the film of adhesive supplied from one to the other, and an adhesive applying roll, means for maintaining the adhesive carrying portion of said adhesive applying roll spaced a predetermined distance from said adhesive supply roll during the transfer of adhesive from said supply roll to said applying roll, and means for movingthe adhesive applying roll to perform the adhesive applying operation.

6. In a packaging machine, in combination, a pair of adhesive supply rolls each having an adhesive carrying portion and an adhesive-free portion, means for adjustably maintaining the adhesive carrying portions of said supply rolls in predetermined spaced relation whereby to maintain on each a film of adhesive of predetermined thickness, a pair of adhesive applying rolls each receiving adhesive from one of said supply rolls and each having an adhesive carrying portion and an adhesive-free portion, means including said adhesive-free portions for maintaining the adhesive carrying portions of said applying rolls in predetermined spaced relation with respect to their respective adhesive supply rolls during the transfer of adhesive from said supply rolls to said applying rolls, and means for moving said addetermined spaced relation with respect to their respective adhesive supply rolls during the transfer of adhesive from said supply rolls to said applying rolls, carton supporting means arranged to support a carton with extended top and bottom flaps, and means for moving said adhesive applying rolls to apply adhesive to said top and bot- 8. In a packaging machine, in combination, two cooperating rolls having portions of each arranged to engage in one position of operation and having other portions of said rolls spaced at a predetermined and relatively short distance from one another in said position of operation, means for maintaining a supply of adhesive upon the first roll of a thickness slightly greater than the aforesaid space between said rollers whereby upon rotation of the rolls, a film of adhesive of predetermined thickness is transferred to the second portion of the second roller, and means for moving the second roll to transfer said predetermined film of adhesive onto a carton flap including roll moving mechanism and carton supporting means.

9. In a packaging machine, in combination, an adhesive supply roll having an adhesive carrying portion and an adhesive-free portion, an adhesive applying roll also having an adhesive carrying portion and an adhesive-free portion arranged to be moved into cooperative engagement with said supply roll to effect the transfer of adhesive from said supply roll to said applying roll, means for supplying adhesive to said supply roll, means including said adhesive-free portions for maintaining the adhesive carrying portion of said applying roll in predetermined spaced relation with respect to said supply roll during the adhesive transferring operation, and means for moving said applying roll to perform the adhesive applying operation.

10. In a packaging machine, in combination, a pair of adhesive supply rolls each having an adhesive carrying portion, means for adjustably maintaining the adhesive carrying portions of said supply rolls in predetermined spaced relation whereby to maintain on each a film of adhesive of predetermined thickness including an eccentric member'upon which one of said supply rolls is rotatably mounted, means operatively connected to said eccentric member for manually rocking the latter to effect a change in the spacing between said supply rolls, a pair of adhesive moving said adhesive applying rolls to perform the adhesive applying operation.

11. In a packaging machine, in combination, an adhesive supply roll having an adhesive carrying portion and an adhesive-free portion, an adhesive applying roll also having an adhesive carrying portion and an adhesive-free portion and arranged to be moved into cooperative engagement with said supply roll to effect the transfer of adhesive from said supply roll to said applying roll, means for supplying adhesive to the supply roll, means including said adhesivefree portions for maintaining the adhesive carrying portions of said applying roll in predetermined; spaced relation with respect to said supply roll during the adhesive transferring operation, said adhesive free portions of said applying roll being slightly larger in diameter than the adhesive applying surface thereof, and means for moving the adhesive applying roll to perform the adhesive applying operation.

12. In a packaging machine, in combination, an adhesive supply roll having an adhesive .carrying portion and an adhesive-free portion, an adhesive applying roll also having. an adhesive carrying portion and an adhesive-free portion and arranged to be moved into cooperative engagement with said supply roll to effect the transfer of adhesive from said supply roll to said applying roll, means for supplying adhesive to the supply roll, means including said adhesivefree portions for maintaining the adhesive carrying portions of said applying roll in predetermined spaced relation with respect to said supply roll during the adhesive transferring operation, said adhesive free portions of said applying roll being slightly larger in diameter than the adhesive applying surface thereof, means for confining the adhesive supplied by said adhesive supply means to the adhesive carrying portion of said supply roll, and means for moving the adhesive applying roll to perform the adhesive applying operation.

13. In a packaging machine, in combination, an adhesive supply roll having an adhesive carrying portion and an adhesive-free portion, an adhesive applying roll also having an adhesive carrying portion and an adhesive-free portion and arranged to,be moved into cooperative engagement with said supply roll to effect the transfer of adhesive from said supply roll to said applying roll, means for supplying adhesive to the supply roll including means for receiving and recirculating the surplus adhesive, means including said adhesive-free portions for maintaining the ad-.

hesive carrying portions of said applying roll in predetermined spaced relation with respect to said supply roll during the adhesive transferring operation, said adhesive free portions of said ap-.

plying roll being slightly larger in diameter than the adhesive applying surface thereof, and means for moving the adhesive applying roll to perform the adhesive applying operation.

14. In a packaging machine, in combination,

carton supporting means arranged to support a carton having a vertically extended flap, a horizontally extended flap supporting plate disposed adjacent said carton supporting means, a rockingly mounted flap engaging finger for moving said vertically extended flap to a horizontal position against said plate, an adhesive supplyroller, an adhesive applying roller, means for supplying adhesive to said supply roller, means for moving said applying roller into cooperative engagement with said supply roll to transfer the adhesive from said supply roll to said applying roll, means for maintaining said applying roller a predetermined distance from said supply roll during the transferring operation including cooperating adhesive-free portions of said rolls, said applying roll moving means being arranged to move the applying roll to apply adhesive to said horizontally extended flap, said flap moving means being arranged to be retracted when the applying roller engages said flap.

15. In a packaging machine, in combination, carton supporting means arranged to be moved to present a carton to the adhesive applying station of the packaging machine, adhesive applying means including an applying roll and a supply roll, means for moving said applying roll from cooperative engagement with said supply roll to a position to apply adhesive to said carton, means for maintaining said applying roll a predetermined distance from said roll during the transferring operation including cooperating adhesivefree portions of said rolls, and means for preventing movement of said applying roller to its adhesive applying position in the event that a carton is not present in said carton supporting means, said last named means including a feeler finger disposed in the path of said carton and mechanism operatively connected to said feeler finger operative to prevent movement of said applying roll upon the absence of a carton, said mechanism being rendered inoperative when said feeler finger engages a carton in said carton supporting means.

16. In a packaging machine, in combination, an adhesive supply roll having an adhesive carrying portion and an adhesive-free portion, an adhesive applying roll also having an adhesive carrying portion and an adhesive-free portion and arranged to be moved into cooperative engagement with said supply roll to effect the transfer of adhesive from said supply roll to said apply- 5 ing roll, means for supplying adhesive to the supply roll, means including said adhesive-free portions for maintaining the adhesive carrying portions of said applying roll in predetermined spaced relation with respect to said supply roll during the adhesive transferring operation, said adhesive free portions of said applying roll being slightly larger in diameter than the adhesive applying surface thereof, said supply roll being provided with grooved portions between said adhesive carrying and said adhesive free portions, and scraper members having portions running in said grooved portions arranged to confine the adhesive to said adhesive carrying portion of the roll, and means for moving the adhesive applying roll to perform the adhesive applying operation. 17. In a packaging machine, in combination, an adhesive supply roll having an adhesive carrying portion and an adhesive-free portion, a second and smaller roll cooperating therewith also 25 having an adhesive carrying portion and an adhesive-free portion, the adhesive-free portions of said rolls being arranged to engage each other, the adhesive carrying portions being arranged to be spaced a short distance apart when the 30 adhesive-free portions are in engagement, carton supporting means arranged to support a carton with a flap extended, roll moving means arranged to move the second roll over said flap to apply adhesive thereto, and means for supplying 85 adhesive to said adhesive supply roll.

STANLEY R. HoWARp. 

